Gallus was a gorilla and an Ape City guard who was sent to The Reef as a political prisoner under the regime of Councilor Tenebris. After initially fighting with General Aleron upon his arrival at the prison, Gallus and Timon decided to start a prison riot to cover Aleron's escape back to Ape City, where they hoped he could secure their freedom. When Tenebris was killed and Aleron disappeared, the political prisoners were granted an amnesty.